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BSD 4_3_Tahoe release
[unix-history] / usr / src / games / rogue / curses.c
/*
* curses.c
*
* This source herein may be modified and/or distributed by anybody who
* so desires, with the following restrictions:
* 1.) No portion of this notice shall be removed.
* 2.) Credit shall not be taken for the creation of this source.
* 3.) This code is not to be traded, sold, or used for personal
* gain or profit.
*
*/
#ifndef lint
static char sccsid[] = "@(#)curses.c 5.1 (Berkeley) 11/25/87";
#endif /* not lint */
#ifdef CURSES
/* The following is a curses emulation package suitable for the rogue program
* in which it is included. No other suitability is claimed or suspected.
* Only those routines currently needed by this rogue program are included.
* This is being provided for those systems that don't have a suitable
* curses package and want to run this rogue program.
*
* Compile the entire program with -DCURSES to incorporate this package.
*
* The following is NOT supported:
* "%D", "%B", "%n", or "%>" inside a cursor motion (cm) termcap string.
* Terminals in which the cursor motion addresses the row differently from
* the column, as in ":cm=\E%2,%3" or ":cm=\EY%+x;%+y"
* Termcap database stored in the TERMCAP environ variable as returned
* from md_getenv(). Only the termcap file name can be stored there.
* See the comments for md_getenv() in machdep.c.
* Terminals without non-destructive backspace. Backspace (^H) is used
* for cursor motion regardless of any termcap entries.
* The ":tc=" termcap entry is ignored.
*
* Suggestions:
* Use line-feed as your termcap "do" entry: ":do=^J", ":do=\012" or
* ":do=\n" This will help cursor motion optimization. If line-feed
* won't work, then a short escape sequence will do.
*/
#include <stdio.h>
#include "rogue.h"
boolean tc_tname();
#define BS 010
#define LF 012
#define CR 015
#define ESC '\033'
#define TAB '\011'
#define ST_MASK 0x80
#define BUFLEN 256
char terminal[DROWS][DCOLS];
char buffer[DROWS][DCOLS];
char *tc_file;
char cm_esc[16];
char cm_sep[16];
char cm_end[16];
boolean cm_reverse = 0;
boolean cm_two = 0;
boolean cm_three = 0;
boolean cm_char = 0;
short cm_inc = 0;
boolean screen_dirty;
boolean lines_dirty[DROWS];
boolean buf_stand_out = 0;
boolean term_stand_out = 0;
int LINES = DROWS;
int COLS = DCOLS;
WINDOW scr_buf;
WINDOW *curscr = &scr_buf;
char *CL = (char *) 0;
char *CM = (char *) 0;
char *UC = (char *) 0; /* UP */
char *DO = (char *) 0;
char *VS = "";
char *VE = "";
char *TI = "";
char *TE = "";
char *SO = "";
char *SE = "";
short cur_row;
short cur_col;
initscr()
{
clear();
get_term_info();
printf("%s%s", TI, VS);
}
endwin()
{
printf("%s%s", TE, VE);
md_cbreak_no_echo_nonl(0);
}
move(row, col)
short row, col;
{
curscr->_cury = row;
curscr->_curx = col;
screen_dirty = 1;
}
mvaddstr(row, col, str)
short row, col;
char *str;
{
move(row, col);
addstr(str);
}
addstr(str)
char *str;
{
while (*str) {
addch((int) *str++);
}
}
addch(ch)
register int ch;
{
short row, col;
row = curscr->_cury;
col = curscr->_curx++;
if (buf_stand_out) {
ch |= ST_MASK;
}
buffer[row][col] = (char) ch;
lines_dirty[row] = 1;
screen_dirty = 1;
}
mvaddch(row, col, ch)
short row, col;
int ch;
{
move(row, col);
addch(ch);
}
refresh()
{
register i, j, line;
short old_row, old_col, first_row;
if (screen_dirty) {
old_row = curscr->_cury;
old_col = curscr->_curx;
first_row = cur_row;
for (i = 0; i < DROWS; i++) {
line = (first_row + i) % DROWS;
if (lines_dirty[line]) {
for (j = 0; j < DCOLS; j++) {
if (buffer[line][j] != terminal[line][j]) {
put_char_at(line, j, buffer[line][j]);
}
}
lines_dirty[line] = 0;
}
}
put_cursor(old_row, old_col);
screen_dirty = 0;
fflush(stdout);
}
}
wrefresh(scr)
WINDOW *scr;
{
short i, col;
printf("%s", CL);
cur_row = cur_col = 0;
for (i = 0; i < DROWS; i++) {
col = 0;
while (col < DCOLS) {
while ((col < DCOLS) && (buffer[i][col] == ' ')) {
col++;
}
if (col < DCOLS) {
put_cursor(i, col);
}
while ((col < DCOLS) && (buffer[i][col] != ' ')) {
put_st_char((int) buffer[i][col]);
cur_col++;
col++;
}
}
}
put_cursor(curscr->_cury, curscr->_curx);
fflush(stdout);
scr = scr; /* make lint happy */
}
mvinch(row, col)
short row, col;
{
move(row, col);
return((int) buffer[row][col]);
}
clear()
{
printf("%s", CL);
fflush(stdout);
cur_row = cur_col = 0;
move(0, 0);
clear_buffers();
}
clrtoeol()
{
short row, col;
row = curscr->_cury;
for (col = curscr->_curx; col < DCOLS; col++) {
buffer[row][col] = ' ';
}
lines_dirty[row] = 1;
}
standout()
{
buf_stand_out = 1;
}
standend()
{
buf_stand_out = 0;
}
crmode()
{
md_cbreak_no_echo_nonl(1);
}
noecho()
{
/* crmode() takes care of this */
}
nonl()
{
/* crmode() takes care of this */
}
clear_buffers()
{
register i, j;
screen_dirty = 0;
for (i = 0; i < DROWS; i++) {
lines_dirty[i] = 0;
for (j = 0; j < DCOLS; j++) {
terminal[i][j] = ' ';
buffer[i][j] = ' ';
}
}
}
put_char_at(row, col, ch)
register row, col, ch;
{
put_cursor(row, col);
put_st_char(ch);
terminal[row][col] = (char) ch;
cur_col++;
}
put_cursor(row, col)
register row, col;
{
register i, rdif, cdif;
short ch, t;
rdif = (row > cur_row) ? row - cur_row : cur_row - row;
cdif = (col > cur_col) ? col - cur_col : cur_col - col;
if (((row > cur_row) && DO) || ((cur_row > row) && UC)) {
if ((rdif < 4) && (cdif < 4)) {
for (i = 0; i < rdif; i++) {
printf("%s", ((row < cur_row) ? UC : DO));
}
cur_row = row;
if (col == cur_col) {
return;
}
}
}
if (row == cur_row) {
if (cdif <= 6) {
for (i = 0; i < cdif; i++) {
ch = (col < cur_col) ? BS :
terminal[row][cur_col + i];
put_st_char((int) ch);
}
cur_row = row;
cur_col = col;
return;
}
}
cur_row = row;
cur_col = col;
row += cm_inc;
col += cm_inc;
if (cm_reverse) {
t = row;
row = col;
col = t;
}
if (cm_two) {
printf("%s%02d%s%02d%s", cm_esc, row, cm_sep, col, cm_end);
} else if (cm_three) {
printf("%s%03d%s%03d%s", cm_esc, row, cm_sep, col, cm_end);
} else if (cm_char) {
printf("%s%c%s%c%s", cm_esc, row, cm_sep, col, cm_end);
} else {
printf("%s%d%s%d%s", cm_esc, row, cm_sep, col, cm_end);
}
}
put_st_char(ch)
register ch;
{
if ((ch & ST_MASK) && (!term_stand_out)) {
ch &= ~ST_MASK;
printf("%s%c", SO, ch);
term_stand_out = 1;
} else if ((!(ch & ST_MASK)) && term_stand_out) {
printf("%s%c", SE, ch);
term_stand_out = 0;
} else {
ch &= ~ST_MASK;
putchar(ch);
}
}
get_term_info()
{
FILE *fp;
char *term, *tcf;
char buf[BUFLEN];
if (tcf = md_getenv("TERMCAP")) {
if (strlen(tcf) > 40) {
clean_up("TERMCAP file name too long");
}
tc_file = tcf;
} else {
if (!(tc_file = md_gdtcf())) {
clean_up("I need a termcap file");
}
}
if (!(term = md_getenv("TERM"))) {
clean_up("Cannot find TERM variable in environ");
}
if ((fp = fopen(tc_file, "r")) == NULL) {
sprintf(buf, "Cannot open TERMCAP file: %s", tc_file);
clean_up(buf);
}
if (!tc_tname(fp, term, buf)) {
sprintf(buf, "Cannot find TERM type: %s in TERMCAP file: %s", term,
tc_file);
clean_up(buf);
}
tc_gtdata(fp, buf);
fclose(fp);
}
boolean
tc_tname(fp, term, buf)
FILE *fp;
char *term;
char *buf;
{
short i, j;
boolean found = 0;
char *fg;
while (!found) {
i = 0;
fg = fgets(buf, BUFLEN, fp);
if (fg != NULL) {
if ( (buf[0] != '#') && (buf[0] != ' ') && (buf[0] != TAB) &&
(buf[0] != CR) && (buf[0] != LF)) {
while (buf[i] && (!found)) {
j = 0;
while (buf[i] == term[j]) {
i++;
j++;
}
if ((!term[j]) && ((buf[i] == '|') || (buf[i] == ':'))) {
found = 1;
} else {
while (buf[i] && (buf[i] != '|') && (buf[i] != ':')) {
i++;
}
if (buf[i]) {
i++;
}
}
}
}
} else {
break;
}
}
return(found);
}
tc_gtdata(fp, buf)
FILE *fp;
char *buf;
{
short i;
boolean first = 1;
do {
if (!first) {
if ((buf[0] != TAB) && (buf[0] != ' ')) {
break;
}
}
first = 0;
i = 0;
while (buf[i]) {
while (buf[i] && (buf[i] != ':')) {
i++;
}
if (buf[i] == ':') {
if (!strncmp(buf + i, ":cl=", 4)) {
tc_gets(buf + i, &CL);
} else if (!strncmp(buf + i, ":cm=", 4)) {
tc_gets(buf + i, &CM);
} else if (!strncmp(buf + i, ":up=", 4)) {
tc_gets(buf + i, &UC);
} else if (!strncmp(buf + i, ":do=", 4)) {
tc_gets(buf + i, &DO);
} else if (!strncmp(buf + i, ":vs=", 4)) {
tc_gets(buf + i, &VS);
} else if (!strncmp(buf + i, ":ve=", 4)) {
tc_gets(buf + i, &VE);
} else if (!strncmp(buf + i, ":ti=", 4)) {
tc_gets(buf + i, &TI);
} else if (!strncmp(buf + i, ":te=", 4)) {
tc_gets(buf + i, &TE);
} else if (!strncmp(buf + i, ":vs=", 4)) {
tc_gets(buf + i, &VS);
} else if (!strncmp(buf + i, ":ve=", 4)) {
tc_gets(buf + i, &VE);
} else if (!strncmp(buf + i, ":so=", 4)) {
tc_gets(buf + i, &SO);
} else if (!strncmp(buf + i, ":se=", 4)) {
tc_gets(buf + i, &SE);
} else if (!strncmp(buf + i, ":li#", 4)) {
tc_gnum(buf + i, &LINES);
} else if (!strncmp(buf + i, ":co#", 4)) {
tc_gnum(buf + i, &COLS);
}
i++;
}
}
} while (fgets(buf, BUFLEN, fp) != NULL);
if ((!CM) || (!CL)) {
clean_up("Terminal and termcap must have cm and cl");
}
tc_cmget();
}
tc_gets(ibuf, tcstr)
char *ibuf;
char **tcstr;
{
short i, j, k, n;
char obuf[BUFLEN];
i = 4;
j = 0;
while (ibuf[i] && is_digit(ibuf[i])) {
i++;
}
while (ibuf[i] && (ibuf[i] != ':')) {
if (ibuf[i] == '\\') {
i++;
switch(ibuf[i]) {
case 'E':
obuf[j] = ESC;
i++;
break;
case 'n':
obuf[j] = LF;
i++;
break;
case 'r':
obuf[j] = CR;
i++;
break;
case 'b':
obuf[j] = BS;
i++;
break;
case 't':
obuf[j] = TAB;
i++;
break;
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
n = 0;
k = 0;
while (k < 3 && ibuf[i] && is_digit(ibuf[i])) {
n = (8 * n) + (ibuf[i] - '0');
i++;
k++;
}
obuf[j] = (char) n;
break;
default:
obuf[j] = ibuf[i];
i++;
}
} else if (ibuf[i] == '^') {
obuf[j] = ibuf[i+1] - 64;
i += 2;
} else {
obuf[j] = ibuf[i++];
}
j++;
}
obuf[j] = 0;
if (!(*tcstr = md_malloc(j + 1))) {
clean_up("cannot alloc() memory");
}
(void) strcpy(*tcstr, obuf);
}
tc_gnum(ibuf, n)
char *ibuf;
int *n;
{
short i;
int r = 0;
i = 4;
while (is_digit(ibuf[i])) {
r = (r * 10) + (ibuf[i] - '0');
i++;
}
*n = r;
}
tstp()
{
endwin();
md_tstp();
start_window();
printf("%s%s", TI, VS);
wrefresh(curscr);
md_slurp();
}
tc_cmget()
{
short i = 0, j = 0, rc_spec = 0;
while (CM[i] && (CM[i] != '%') && (j < 15)) {
cm_esc[j++] = CM[i++];
}
cm_esc[j] = 0;
while (CM[i] && (rc_spec < 2)) {
if (CM[i] == '%') {
i++;
switch(CM[i]) {
case 'd':
rc_spec++;
break;
case 'i':
cm_inc = 1;
break;
case '2':
cm_two = 1;
rc_spec++;
break;
case '3':
cm_three = 1;
rc_spec++;
break;
case '.':
cm_char = 1;
rc_spec++;
break;
case 'r':
cm_reverse = 1;
break;
case '+':
i++;
cm_inc = CM[i];
cm_char = 1;
rc_spec++;
break;
}
i++;
} else {
j = 0;
while (CM[i] && (CM[i] != '%')) {
cm_sep[j++] = CM[i++];
}
cm_sep[j] = 0;
}
}
j = 0;
if (rc_spec == 2) {
while (CM[i] && (j < 15)) {
cm_end[j++] = CM[i++];
}
}
cm_end[j] = 0;
}
#endif
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.